Been using for almost 6 months.  Screen stays black despite trying to unlock device.  Downloaded and connected to escribe to update to latest firmware.  Once finished applying, screen flashed with 2 clock errors but then went back to being black.  Device monitor is full of errors.  After opening device monitor, escribe can no longer recognize device unless i close program and reopen.  I am running as administrator.  I have used multiple usb cords on different usp ports on different computers.  I have also tried using different batteries.  I am at my wits end trying top figure out what to do.